1/2 17MM METRIC DEEP PRO NON-SLIP IMPACT SOCKET CDPA17M | eBaydiy Tools

Specially heat-treated to provide continuous impact use
Enhanced 6-point contact design with socket teeth that grip the flat sides of the fastener to drive a nut that is 70% rounded off
Easier identification with high-visibility laser and impression stamped size markings
Get the job done easier with a unique non-slip design that protects and works on 6-point, TORX and 70% rounded off nuts and fasteners